Lust is the desire for sexual proclivities to be met! As Jesus calls this a sin, it seems that He is being a bit unfair, I mean give me a break, who doesn't do it it some point. But Christ was being very reasonable, for us to submit to the passions would sort of reduce us to dogs! We have that...
It's rather silly to sort of anthromorphatize God to our likeness in an exhaustive manner. I think that the male description of God is entirely plausible; not in the sense that He is muscular and has a penis, rather that He is by essence a Leader, or Mighty, or the Head...as in the Hebrew word...